I just completed a L86 8L90 swap and have numerous codes which should get resolved soon but the transmission has a number of codes that make the transmission unusable. P0706 P0708 P0751 P0762 and U0101. Is this a tuning or wiring issue? I didn?t have a TCM that came with my transmission so I had to buy one from a wrecked truck. I sent the TCM to my tuner when I sent the ECM but thought I would run this by you guys before I send it back to him.